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Chromotropic ferrocenyl chalcone with two pyrenyl groups: Solvatochromism and molecular chemosensor for Fe(III)/Fe(II) ions

A chromotropic ferrocenyl chalcone with two pyrenyl groups (Fc-dPyr) is prepared and spectroscopically characterized. The X-ray structure analysis shows that the two pyrenyl groups are almost parallel to each other with a torsion angle of 5.57 and adopt a dimeric mode with a distance of 3.776 A? between them, ready to form an excimer. The solvatochromic fluorescence spectra indicate that the emission maxima observed in hydrogen-bonding donor (HBD) solvents (CHCl3, EtOH and MeOH) exhibit a strictly linear relationship with the normalized ETN value, while those in a non-HBD solvent (CH3CN) do not. The molecular chemosensor activity of Fc-dPyr is highly selective toward Fe(III) ions over Fe(II) ions. The fluorescence emission intensity of Fc-dPyr steeply decreases in the presence of Fe(III) ions as an oxidant, but not in the presence of Fe(II) ions.

Chromotropic ferrocenyl chalcone with two pyrenyl groups: Solvatochromism and molecular chemosensor for Fe(III)/Fe(II) ions

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

 

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A ferrocene derivative of the ansa tertiary amine and its preparation method and application (by machine translation)

The invention discloses a ansa-ferrocene derivative of the tertiary amine and its preparation method and application. Its application in particular to the amount-of-substance ratio of 1:1 of the ansa-ferrocene derivative of the tertiary amine and the three (five fluoro phenyl) boron composition “hindered” Lewis acid alkali catalyst, the catalyst is applied to the obtained catalytic imine hydrogenation reduction reaction. The catalyst has good stability, to a certain extent can replace the heavy metal catalyst, can be from the source to prevent chemicals in on heavy metal pollution, it has better application value and potential social and economic benefits. (by machine translation)

A ferrocene derivative of the ansa tertiary amine and its preparation method and application (by machine translation)

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

 

Reference of 1273-94-5, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 1273-94-5, molcular formula is C14H6FeO2, introducing its new discovery.

MOESSBAUER STUDIES ON FERROCENE COMPLEXES. V. PROTONATION OF FERROCENYL KETONES

The structure of protonated ferrocenes has been investigated using 1H NMR and 57Fe Moessbauer spectroscopy.The ketones were fully protonated in CF3CO2H and in 70percent H2SO4/H2O.In more concentrated sulphuric acid < > 90percent H2SO4/H2O) rapid heteroannular sulphonation occurred.No evidence was obtained of any iron protonation in these systems.For the para substituted aromatic derivatives C5H5FeC5H4COC6H4X the NMR data indicates steric inhibition to resonance. 1,1′-Diketones are doubly protonated in strongly acid media (98percent H2SO4, CF3SO3H).Moessbauer data on the solid ketones showed decrease in quadrupole splitting (QS), relative to ferrocene itself, of about 0.12 mm s-1 for each successive acyl function added.For solid solutions of the protonated ketones in CF3CO2H this decrease (DeltaQS) was much larger at about 0.28 mm s-1.The results are interpreted as involving electron withdrawal from ring-based orbitals (epsilon1), rather than the iron-based orbitals (epsilon2).In the aromatic series, DeltaQS was significantly smaller for electron withdrawing substituents.

MOESSBAUER STUDIES ON FERROCENE COMPLEXES. V. PROTONATION OF FERROCENYL KETONES

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 1273-94-5 is helpful to your research. Reference of 1273-94-5

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

 

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Safety of 1,1′-Diacetylferrocene, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 1273-94-5, Name is 1,1′-Diacetylferrocene, molecular formula is C14H6FeO2

Spiroferrocenophanes. I. 3-Spiro<5>ferrocenophane-1,5-diones from the direct condensation of diacetylferrocene with cycloalkanones

Condensation of diacetylferrocene with cyclohexanone, alkyl- or phenyl-cyclohexanones and cycloheptanone carried out in DMSO in the presence of KOH afforded 3-spiro<5>ferrocenophane-1,5-diones.Cyclopentanone and cyclooctanone failed to give the spiroferrocenophanediones.The mechanism of the reaction, its limitations and side products are discussed.Detailed analysis of the 1H NMR and 13C NMR spectra revealed an influence of the cyclohexane ring substituents on the flexibility of the spiroferrocenophanedione bridge.Fragmentation of the product molecules upon electron impact is also described.

Spiroferrocenophanes. I. 3-Spiro<5>ferrocenophane-1,5-diones from the direct condensation of diacetylferrocene with cycloalkanones

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Safety of 1,1′-Diacetylferrocene, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1273-94-5, in my other articles.

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

 

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Quality Control of 1,1′-Diacetylferrocene, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 1273-94-5, Name is 1,1′-Diacetylferrocene, molecular formula is C14H6FeO2

Structure elucidation and DFT-study on substrate-selective formation of chalcones containing ferrocene and phenothiazine units. Study on ferrocenes, Part 17

By means of base-catalysed condensation of 1-acyl-/1,1?- diacylferrocenes (acylformyl or acetyl) with 3-formyl- and 3,7- diacetylphenothiazines a series of novel mono- and bis-chalcones were prepared. The enhanced reactivity of the enolate anions of the mono-chalcone intermediates relative to that of the enolates of the corresponding diacetyl-substituted precursor was interpreted by the electron-releasing effect of the ferrocenyl- or phenothiazinyl group present in the beta position of the enone subunit. The structures of the novel products were evidenced by IR, 1H and 13C NMR spectroscopy including 2D-COSY, 2D-HSQC and 2D-HMBC measurements.

Structure elucidation and DFT-study on substrate-selective formation of chalcones containing ferrocene and phenothiazine units. Study on ferrocenes, Part 17

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Quality Control of 1,1′-Diacetylferrocene, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1273-94-5, in my other articles.

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

 

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Reaction of acetyl- and 1,1?-diacetylferrocene with isatin (Pfitzinger reaction)

An efficient method for the synthesis of 2-ferrocenyl-substituted quinoline-4-carboxylic acids via the reaction of acetyl- and 1,1?-diacetylferrocene with isatin under the conditions of the Pfitzinger reaction was developed. Starting from the obtained acids methyl esters, amides, N-methyl-N-methoxyamides, and oximes (at one of the free acetyl groups) of some of these compounds were synthesized.

Reaction of acetyl- and 1,1?-diacetylferrocene with isatin (Pfitzinger reaction)

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

 

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Application In Synthesis of 1,1′-Diacetylferrocene, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 1273-94-5, Name is 1,1′-Diacetylferrocene, molecular formula is C14H6FeO2

Self-assembly of a chloro-bridged helical coordination polymer achieved from a ferrocenyl-containing double-helicate

A new chloro-bridged single-helical chain has been constructed from a ferrocenyl-containing tetranuclear double-helical architecture via self-assembly.

Self-assembly of a chloro-bridged helical coordination polymer achieved from a ferrocenyl-containing double-helicate

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Application In Synthesis of 1,1′-Diacetylferrocene, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1273-94-5, in my other articles.

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

 

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Friedel-crafts acetylation of bis(trimethylsilyl)- and bis(tributylstannyl)ferrocene: implications on the mechanisms of acylation and proton exchange of ferrocene derivatives

The first unequivocal examples of intermolecular Friedel-Crafts reactions of ferrocene derivatives proceeding via exo attack of the electrophile are reported. Treatment of 1,1?-bis(trimethylsilyl)-(5a) or 1,1?-bis(tributylstannyl)ferrocene (5b) with acetyl chloride in the presence of AlCl3 affords a mixture of three isomeric acetylferrocenes, 1?-acetyl- (6), 2-acetyl-(7), and 3-acetyl-1-(trialkylsilyl and -stannyl)ferrocene (8). Acetylation of 3,3?-dideutero-1,1?-bis(trimethylsilyl)ferrocene (5aD2) under identical conditions generates the corresponding dideuterated products 6aD2-8aD2. Both 6aD2 and 7aD2 contam 1.0 deuterium atom in each cyclopentadienyl ring whereas 8aD2 contains 05 deutenum atom in the substituted ring and 1.5 deuterium atoms in the “unsubstituted” ring. This demonstrates that the products are formed via exo attack of the electrophile followed by an intramolecular, interannular proton transfer. The lack of scrambling of the deuterium label also suggests that protonation of ferrocenes could also occur through the exo attack of a proton rather than direct protonation at the metal center.

Friedel-crafts acetylation of bis(trimethylsilyl)- and bis(tributylstannyl)ferrocene: implications on the mechanisms of acylation and proton exchange of ferrocene derivatives

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

 

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. HPLC of Formula: C14H6FeO2, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 1273-94-5, name is 1,1′-Diacetylferrocene. In an article£¬Which mentioned a new discovery about 1273-94-5

Chromotropism behavior and biological activity of some schiff base-mixed ligand transition metal complexes

We report about a series of mono-nuclear and bi-nuclear complexes with acyclic as well as macro-cyclic ligands, which have been synthesized with Schiff base ligands in tri- tetra and pentadentate forms. The bonding sites on complex formation are mainly the azomethine groups and/or imide nitrogen, ketonic oxygen or sulphur atoms. Complexes of two series of Schiff base ligands, H 2 La and H2 Lb derived from the reaction of 2,6-diacetyl pyridine with semicarbazide, replaced by or thiosemicarbazide with the metal ions, Co(II), Ni(II), Cu(II), VO(IV) and UO2(VI) have been prepared. Mono-nuclear complexes with tetradentate macrocyclic Schiff base ligands, derived from the condensation of 1,1?-diacetylferrocene with 1,3-diaminopropanein in the molar ratio 1:1 and 1:2 have been also synthesized and react with the transition metal ions, copper(II), nickel(II), cobalt(II), and Zinc(II) in the molar ratio 1:1. The structures of these ligands as well as the related complexes are elucidated by different spectroscopic methods. Solvatochromic behavior of copper(II) mixed ligand complexes of 3-acetylcoumarine (3-ACoum) and dinitrogen bases (L), with the general formula Cu(3-ACoum)(L)Xn; where n = 2, L = N,N,-Rfnet-temp?, N?-tetramethylethylenediamine (tmen), 1,10-phenanthroline (phen), 2,2?-bipyridine (bipy) and X = ClO 4-, BF4- or NO3- their synthesis and characterization by elemental analysis, IR, UV-Vis, electron spin resonance spectra, magnetic susceptibility and conductivity measurements is reported. The d-d absorption bands of tmen-complexes in weak donor solvents show the formation of square planar or square pyramidal geometries, whilst the strong donor solvents yield octahedral complexes. The observed solvatochromism is mainly due to the solute-solvent interaction between the chelate cation and the solvent molecules and the spectra displayed the possibility of using these complexes as Lewis base indicators. The Coats-Redfern equation can be used to calculate the kinetic and thermodynamic parameters for the different thermal decomposition steps of some complexes. Cyclic voltagrammes of Co(II) and Ni(II) show quasi-reversible peaks and characterize the redox properties and the nature of the electroactive species of the complexes. Biochemically, both the ligands and the complexes show growth inhibitory activity against pathogenic bacteria and plant pathogenic fungi.

Chromotropism behavior and biological activity of some schiff base-mixed ligand transition metal complexes

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

 

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Formula: C14H6FeO2, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 1273-94-5, Name is 1,1′-Diacetylferrocene, molecular formula is C14H6FeO2

Solubility of diacetylferrocene in water-salt solutions

The solubility of diacetylferrocene in water at different temperatures and in aqueous solutions of electrolytes at different concentrations of the latter at 25C was studied.

Solubility of diacetylferrocene in water-salt solutions

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion